It is always good to know when will other people want to cut off your head. Let us look at when were most heads cut off: that was probably the French revolution. OK, what made people want to cut off other people’s heads? Extreme inequality. OK, what was the Gini coefficient? Well, one estimate is 59 [1]. OK, so if we look at the US Gini coefficient it seems to be rising approximately linearly since 1980. In particular, US Census Bureau (via Wikipedia [2]) has the following data:

1980

40.3

1990

42.8

2000

46.2

2009

46.8

Let us do linear regression to obtain:

2020

50.0

2030

52.4

2040

54.8

2050

57.1

2058

59.0

2060

59.5

2070

61.9

2080

64.3

So, I guess people will start trying to cut other people’s heads off around 2058. We’re all safe till then.